Solve the triangle.A = 60°, B = 40°, a = 2
A. C = 80°, b = 1.48, c = 2.27
B. C = 80°, b = 2.48, c = 2.27
C. C = 80°, b = 2.27, c = 1.48
D. C = 80°, b = 2.27, c = 0.48
Answer: A
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Solve the problem.Ariel, a marine biologist, models a population P of crabs, t days after being left to reproduce, with the function 
. Assuming that this model continues to be accurate, when will this population become extinct? (Round to the nearest day.)
A. 911 days B. 707 days C. 547 days D. 1512 days
Solve.The average value of a certain type of automobile was $13,380 in 1995 and depreciated to $5820 in 1998. Let y be the average value of the automobile in the year x, where x = 0 represents 1995. Write a linear equation that models the value of the automobile in terms of the year x.
A. y = -2520x + 5820
B. y = - 
x - 5820
C. y = -2520x + 13,380
D. y = -2520x - 1740
Without graphing, determine the number of solutions of the system of equations. State whether the system is consistent or inconsistent. For a system that is consistent, state whether the equations are dependent or independent.
A. one solution; consistent; independent B. one solution; consistent; dependent C. no solution; inconsistent D. infinitely many solutions; inconsistent
The monthly sales of Sunny Electronics' new stereo system is given by 
hundred units per month, x months after its introduction. The price Sunny charges is 
dollars per stereo system,
x months after its introduction. The revenue Sunny earns then must be 
. Find the rate of change of revenue 6 months after introduction. Round your answer to the nearest dollar.
?
A. $437,700 per month
B. $43,770 per month
C. $1,562,400 per month
D. -$391,800 per month
E. -$322,700 per month